How Good Is Your Eyeballing?

So, how good is your eyeballing? The eyeballing game by Matthias Wandell provides you with an opportunity to put a number to your skill. A set of seven geometrical tasks reveals to us the limitations of our graphical perception. For an overview of the tasks, see figures 1 and 3. Players are challenged to solve, as accurately as possible, tasks such as identifying the midpoint between two points, completing a parallelogram given two of the edges, or finding the center of a circle.

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